The height h above sea level (in meters) is linked to air temperature t (in degrees Celsius), atmospheric pressure p (in centimeters of mercury at height h), and atmospheric pressure c at sea level by formula.
h= (30t +8000) ln(c/p)
Mountain is 8000 meters high. Determine atmospheric pressure at the top of mountain on day when temperature is -15°C and atmospheric pressure at sea level is 73 centimeters?